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OpenStack Study: with_default_views.py**** CubicPower OpenStack Study ****
# Copyright 2013 Red Hat, Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. import copy import nova.openstack.common.report.models.base as base_model import nova.openstack.common.report.views.json.generic as jsonviews import nova.openstack.common.report.views.text.generic as textviews import nova.openstack.common.report.views.xml.generic as xmlviews
**** CubicPower OpenStack Study **** class ModelWithDefaultViews(base_model.ReportModel): """A Model With Default Views of Various Types A model with
**** CubicPower OpenStack Study **** def __init__(self, *args, **kwargs): self.views = { 'text': textviews.KeyValueView(), 'json': jsonviews.KeyValueView(), 'xml': xmlviews.KeyValueView() } newargs = copy.copy(kwargs) for k in kwargs: if k.endswith('_view'): self.views[k[:-5]] = kwargs[k] del newargs[k] super(ModelWithDefaultViews, self).__init__(*args, **newargs)
**** CubicPower OpenStack Study **** def set_current_view_type(self, tp): self.attached_view = self.views[tp] super(ModelWithDefaultViews, self).set_current_view_type(tp)
**** CubicPower OpenStack Study **** def __getattr__(self, attrname): if attrname[:3] == 'to_': if self.views[attrname[3:]] is not None: return lambda: self.views[attrname[3:]](self) else: raise NotImplementedError(( "Model {cn.__module__}.{cn.__name__} does not have" + " a default view for " "{tp}").format(cn=type(self), tp=attrname[3:])) else: return super(ModelWithDefaultViews, self).__getattr__(attrname)
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